Yazar "Ornek, Bulent Nafi" için Scopus İndeksli Yayınlar Koleksiyonu listeleme
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Applications of the Jack's lemma for the meromorphic functions
Aydinoglu, Selin; Ornek, Bulent Nafi (Springernature, 2021)In this paper, we give some results on zf'(z)/f(z) for the certain classes of f(z) meromorphic functions. For the function f(z) = 1/z + c(0) + c(1)z + c(2)z(2)+ ... defined in the punctured disc U = {z : 0 -
Estimates Concerned with Hankel Determinant for M (?) Class
Aydinoglu, Selin; Ornek, Bulent Nafi (Univ Nis, Fac Sci Math, 2022)In this paper, we give an upper bound of Hankel determinant of (H2(1)) for the classes of M (alpha), alpha is an element of C. Also, for M (alpha), we obtain a sharp estimate for the classical Fekete-Szego center dot ... -
ESTIMATES FOR ANALYTIC FUNCTIONS ASSOCIATED WITH SCHWARZ LEMMA ON THE BOUNDARY
Kaynakkan, Aysan; Ornek, Bulent Nafi (Kangwon-Kyungki Mathematical Soc, 2022)In this paper, we will introduce the class of analytic functions called R (alpha, lambda) and explore the different 5properties of the functions belonging to this class. -
NEW ESTIMATES FOR MEROMORPHIC FUNCTIONS
Ornek, Bulent Nafi (Publications L Institut Mathematique Matematicki, 2021)A boundary version of the Schwarz lemma for meromorphic functions is investigated. For the function I-n f(z) = 1/z + Sigma(infinity)(k=2) k(n)c(k-2)z(k-2), belonging to the class of W, we estimate from below the modulus ... -
A novel version of slime mould algorithm for global optimization and real world engineering problems Enhanced slime mould algorithm
Ornek, Bulent Nafi; Aydemir, Salih Berkan; Duzenli, Timur; Ozak, Bilal (Elsevier, 2022)The slime mould algorithm is a stochastic optimization algorithm based on the oscillation mode of nature's slime mould, and it has effective convergence. On the other hand, it gets stuck at the local optimum and struggles ... -
ON BOUNDS FOR THE DERIVATIVE OF ANALYTIC FUNCTIONS AT THE BOUNDARY
Ornek, Bulent Nafi; Akyel, Tugba (Kangwon-Kyungki Mathematical Soc, 2021)In this paper, we obtain a new boundary version of the Schwarz lemma for analytic function. We give sharp upper bounds for vertical bar f'(0)vertical bar and sharp lower bounds for vertical bar f'(c)vertical bar with c is ... -
RESULTS ASSOCIATED WITH THE SCHWARZ LEMMA ON THE BOUNDARY
Ornek, Bulent Nafi (Korean Mathematical Soc, 2023)In this paper, some estimations will be given for the analytic functions belonging to the class R (& alpha;). In these estimations, an upper bound and a lower bound will be determined for the first coefficient of the ... -
Sharp Inequalities for Driving Point Impedance Functions
Azeroglu, Tahir Aliyev; Ornek, Bulent Nafi; Duzenli, Timur (Ieee-Inst Electrical Electronics Engineers Inc, 2023)In this brief, positive real functions are considered as driving point impedance functions, Z(s), which are utilized in electrical engineering for characteristic representation of circuits. Accordingly, for the real part ... -
Some remarks on activation function design in complex extreme learning using Schwarz lemma
Ornek, Bulent Nafi; Aydemir, Salih Berkan; Duzenli, Timur; Ozak, Bilal (Elsevier, 2022)Processing of complex valued data has become a challenge issue in classification problems where artificial neural networks are used as the classifier. This issue particularly arises in design of complex valued activation ... -
SOME RESULTS CONCERNED WITH HANKEL DETERMINANT
Ornek, Bulent Nafi (Univ Kragujevac, Fac Science, 2023)In this paper, we discuss different versions of the boundary Schwarz lemma and Hankel determinant for K (alpha) class. Also, for the function f(z) = z + c(2)z(2) + c(3)z(3) + center dot center dot center dot defined in the ... -
SOME RESULTS CONCERNED WITH HANKEL DETERMINANT FOR N (?) CLASS
Atli, Gizem; Ornek, Bulent Nafi (Korean Mathematical Soc, 2021)In this paper, we give some results an upper bound of Hankel determinant of H2(1) for the classes of N (alpha). We get a sharp upper bound for H-2(1) = c(3)-c(2)(2) for N (alpha) by adding z(1), z(2), ... , z(n) zeros of ... -
SOME RESULTS FOR THE CLASS OF ANALYTIC FUNCTIONS CONCERNED WITH SYMMETRIC POINTS
Arabaci, Ayse Nur; Ornek, Bulent Nafi (Kangwon-Kyungki Mathematical Soc, 2023)This paper's objectives are to present the it class of analytical functions and explore the many characteristics of the functions that belong to this class. Some inequalities regarding the angular derivative have been ...